When does a decay chain end?
A. When there is no more mass
B. When radiation has been emitted
C. When the element is stable
D. When the half-life is reached

Answer:

A river flowing at a certain speed comprises kinetic energy as water has certain velocity and mass

Explanation:

Answer: A river flowing at a certain speed or a moving car

Explanation:

Answer:

50g

Explanation:

moalr mass of CaCO3= 40g/mol+ 12g/mol+(16g/mol*3)

                                   =52g/mol+48g/mol

                                   =100g/mol

1 mol= 100g

0.5mol=x

by cross multiplication,

0.5*100gmol=x mol

x=50g

Answer:

what are the following

Explanation:

what are the options?

Answer:

the ball will stop moving

Answer:

i am doing this in science also i would like to know if u know

Explanation:

Answer:

mass = 102.69 g of sucrose

Explanation:

First, you need to use the correct expression of molality (m) which is the following:

m = moles / kg solvent    (1)

According to the exercise, we need to get the grams, in other words, the mass of the sucrose. To get the mass, we need the moles and molecular weight of sucrose and use the following expression:

moles = mass / MM    (2)

Now, if we replace (2) in (1) we have:

m = mass / MM * kg solvent   (3)

From here, we solve for the mass and then:

mass = m * MM * kg solvent (4)

Now, then density of water is 1 kg/L, so, the volume of the water will be the same as it's mass, and the molality is 3 m. The molecular weight of the sucrose is (according to several sources) 342.3 g/mol. Replacing all the data in (4) we have:

mass = 3 mol/kg * 0.1 kg * 342.3 g/mol

Hope this helps

Answer:

Explanation:

Bohrium's most stable isotope, bohrium-270, has a half-life of about 1 minute. It decays into dubnium-266 through alpha decay. Since only a few atoms of bohrium have ever been made, there are currently no uses for bohrium outside of basic scientific research.

Answer:

look it up?

Explanation:

now that i do and I also believe adopt don't shop and also no puppy mill.

Answer:

As nouns the difference between impression and imprint

is that impression is the indentation or depression made by the pressure of one object on or into another while imprint is an impression; the mark left behind by printing something.

The term imprint is defined as to mark by or as if by pressure and the term impression is defined as the effect produced by impressing.

The difference between an imprint and an impression is that the imprint is the mark left behind when anything is printed, whereas the impression is the indentation or depression caused by the pressure of one object against or into another.

While a shoe won't make an impression in loose sand, it will on a hard surface like concrete or linoleum. These imprints or impressions might be contrasted with the shoe of a suspect or the tire of a car to see if they belong to the same object.

Thus, The term imprint is defined as to mark by or as if by pressure and the term impression is defined as the effect produced by impressing.

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Answer:

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we're finding the new pressure

[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]

We have

[tex]P_2 = \frac{6.4 \times 0.87}{20.5} = \frac{5.568}{20.5} \\ = 0.2716.... \\ \\ = 0.27 \: \: \: atm[/tex]

But

1 atm = 14.7 psi

Then 0.27 atm =

[tex] \frac{14.7 \times 0.27}{1} = 3.969 \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

3.97 psi

Explanation:

Answer:

Explanation:

Radon is radioactive.

Radon is a naturally occurring radioactive gas.  

Radon causes cancer.

Breathing radon can increase your risk of developing lung cancer.  

No immediate symptoms.  

You must test for radon.  

Radon is present indoors and outdoors.  

Radon can build up in any building.

Answer: No but I have a three elmos dolls in my basement

Explanation:

Explanation:

If the density of the object is more than that of water, it will sink. Otherwise it will float. The density of water is 1 g/mL.

Substance 1,

Mass, m = 450 g, Volume, V = 90 mL

Density = mass/volume

So,

[tex]d_1=\dfrac{450}{90}\\\\=5\ g/mL[/tex]

It will sink.

Substance 2,

Mass, m = 35 g, Volume, V = 70 mL

Density = mass/volume

So,

[tex]d_2=\dfrac{35}{70}\\\\=0.5\ g/mL[/tex]

It will float.

Substance 3,

Mass, m = 24 g, Volume, V = 12 mL

Density = mass/volume

So,

[tex]d_3=\dfrac{24}{12}\\\\=2\ g/mL[/tex]

It will sink.

Answer:

P1 =4 atm

T1= 20°C

P2=1 atm

T2=?

According to Gay-Lussac's Law or Third Gas Law,

P1T2=P2T1

4×T2=1×20

T2= 20/4

T2= 5°C

Answer At 5°C temperature does a gas at 1.00 atm !

Answer:

When an organism dies, it is usually destroyed by other forms of life and by weathering processes. On rare occasions some body parts—particularly hard ones such as shells, teeth, or bones—are preserved by being buried in mud or protected in some other way from predators and weather. Eventually, they may become petrified and preserved indefinitely with the rocks in which they are embedded. Methods such as radiometric dating—measuring the amounts of natural radioactive atoms that remain in certain minerals to determine the elapsed time since they were constituted—make it possible to estimate the time period when the rocks, and the fossils associated with them.

Answer:

option d) is the correct answer

Answer:

Explanation:

false

Answer:

gas

Explanation:

particles are very far apart

The given diagram represents gaseous state of matter.  Both a volume and a definite form are absent from a gas. The separation of gas particles is great.

Solids, liquids, gases, plus plasma are the four states of matter that may be found in daily life. However, a number of additional states of matter have indeed been found.

Some of these additional states are created when a material transitions among two states of matter and doesn't actually exhibit the characteristics of either state. The most exotic are others. Both a volume and a definite form are absent from a gas. The separation of gas particles is great. The gas in a balloon and the air are two examples of gases. The given diagram represents gaseous state of matter.

Therefore, the given diagram represents gaseous state of matter.

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Answer:

But there is nothing above

Answer:

pag pinag balik tad moyan tama magiging tama sagot nya promise jslsh

Answer:

3 moles of Calcium Oxide are formed

Explanation:

Based on the reaction of Calcium Ca, with oxygen, O₂, to produce calcium oxide, CaO is:

2Ca + O₂ → 2CaO

where 2 moles of calcium produce 2 moles of Calcium oxide.

That means, if 3 moles of Ca react in presence of oxygen:

3 moles of calcium oxide are formed

Explanation:

Its value is 6.02 kj/mol. This means for every mole of ice we melt we must apply 6.02 kj of heat. We can calculate the heat needed with the following equation:

q

=

n

×

Δ

H

where:

q

= heat

n

= moles

Δ

H

= enthalpy

In this problem we would like to calculate the heat needed to melt 35 grams of ice at 0 °C. This problem can be broken into three steps:

1. Calculate moles of water

2. multiply by the enthalpy of fusion

3. Convert kJ to J

Step 1: Calculating moles of water

35

g

×

(

1

m

o

l

18.02

g

)

=

1.94

m

o

l

s

Step 2: Multiply by enthalpy of fusion

q

=

n

×

Δ

H

=

1.94

×

6.02

=

11.678

k

J

Step 3: Convert kJ to J

11.678

k

J

×

(

1000

J

1

k

J

)

=

11

,

678

J

Finally rounding to 2 sig figs (since 34°C has two sig figs) we get

q

=

12

,

000

J

One last note, if the temperature were not 0 °C then the ice would have to be heated in addition to melted. This would be a phase change problem combined with a heat capacity problem.

Answer:

5511.99 mL

Explanation:

Given data

Volume V1= 6052 mL

Temperature T1= 352K

Pressure P1= 892 mm Hg

At STP the parameters of  gas are

Temperature T2= 273.15 K

Pressure P2= 760 mmHg

Applying  the gas equation

P1V1/T1= P2V2/T2

Substitute to find V2 we have

892*6052/352= 760*V2/273.15

5398384/352= 760*V2/273.15

15336.31= 760*V2/273.15

Cross multiply

15336.31*273.15=  760*V2

4189113.0765=  760*V2

4189113.0765/760= V2

V2= 5511.99 mL

Hence the volume at STP is 5511.99 mL

Answer:

-what color is the tube: Transparent

-is the reaction reversible: what reaction

-has the reaction reached equilibrium: I don't see a reaction

BTW you didn't provide all the information.

Answer:

La cantidad de energía disponible de una fuente de energía determinada se denomina recurso energético. La escasez de recursos energéticos (petróleo, carbón y madera) en algunas de las fuentes de energía más utilizadas plantear necesidad de usar otras fuentes investigar el modo más rentable de emplearlas

Explanation:

Answer:

false

Explanation:

its the amount of high-quality energy available from a given quantity of an energy resource minus the high-quality energy needed to make the energy available.

Answer:

c. floodplain

Explanation:

brainliest please!

Answer:

I think the answer is floodplain.

Explanation:

I hope this helps, have a blessed day.

Answer: B

your welcome Bsbssnsnsmsllqql

Answer:

Please find the explanation to this question below.

Explanation: